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This study introduces a conjugated polymer ligand strategy to simultaneously address these challenges by enhancing both charge transport and nanocrystal packing orientation. Unlike conventional insulating ligands, these conjugated polymers exhibit strong interaction with PQD surfaces while facilitating preferred PQD packing through <jats:italic>\u03c0\u2013\u03c0<\/jats:italic> stacking interactions, a mechanism previously unexplored in PQD assemblies. Functionalized with ethylene glycol side chains, these polymers effectively reduce defect density, improve crystallinity, and enhance inter\u2010dot coupling, leading to superior charge transport pathways. As a result, devices incorporating these polymers achieve a significantly improved maximum power conversion efficiency of over 15%, compared to 12.7% for pristine devices, with notable enhancements in short\u2010circuit current density and fill factor. Furthermore, these devices demonstrate exceptional stability, retaining over 85% of their initial efficiency after 850 h. These findings establish conjugated polymer ligands as a dual\u2010functional strategy for passivation and controlled PQD assembly, unlocking new pathways for high\u2010performance and stable PQD solar cells suitable for real\u2010world optoelectronic applications.<\/jats:p>","DOI":"10.1002\/smll.202504757","type":"journal-article","created":{"date-parts":[[2025,7,22]],"date-time":"2025-07-22T07:35:38Z","timestamp":1753169738000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Conjugated Polymer\u2010Driven Compact Crystal Packing and Efficient Charge Transport in Perovskite Quantum Dot Solar Cells"],"prefix":"10.1002","volume":"21","author":[{"given":"Tae Oh","family":"Yoon","sequence":"first","affiliation":[{"name":"School of Chemical Engineering Jeonbuk National University  Jeonju 54896 Republic of 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